Вот несколько способов создания таблицы MySQLi с использованием PHP, а также примеры кода:

Метод 1: использование SQL-запроса

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// Create a connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
// SQL query to create a table
$sql = "CREATE TABLE your_table (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    firstname VARCHAR(30) NOT NULL,
    lastname VARCHAR(30) NOT NULL,
    email VARCHAR(50),
    reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
// Execute the query
if ($conn->query($sql) === TRUE) {
    echo "Table created successfully";
} else {
    echo "Error creating table: " . $conn->error;
}
// Close the connection
$conn->close();
?>

Метод 2: использование объектно-ориентированного подхода

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// Create a connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
// Create a table
$tableName = "your_table";
$table = "CREATE TABLE $tableName (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    firstname VARCHAR(30) NOT NULL,
    lastname VARCHAR(30) NOT NULL,
    email VARCHAR(50),
    reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
// Execute the query
if ($conn->query($table) === TRUE) {
    echo "Table created successfully";
} else {
    echo "Error creating table: " . $conn->error;
}
// Close the connection
$conn->close();
?>

Метод 3: использование процедурного подхода

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// Create a connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
// Create a table
$tableName = "your_table";
$table = "CREATE TABLE $tableName (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    firstname VARCHAR(30) NOT NULL,
    lastname VARCHAR(30) NOT NULL,
    email VARCHAR(50),
    reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
// Execute the query
if (mysqli_query($conn, $table)) {
    echo "Table created successfully";
} else {
    echo "Error creating table: " . mysqli_error($conn);
}
// Close the connection
mysqli_close($conn);
?>